CN106253707A - Power control circuit and air-conditioner - Google Patents

Power control circuit and air-conditioner Download PDF

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Publication number
CN106253707A
CN106253707A CN201610703668.1A CN201610703668A CN106253707A CN 106253707 A CN106253707 A CN 106253707A CN 201610703668 A CN201610703668 A CN 201610703668A CN 106253707 A CN106253707 A CN 106253707A
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China
Prior art keywords
circuit
diode
resistance
electric capacity
filter
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Pending
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CN201610703668.1A
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Chinese (zh)
Inventor
文先仕
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Midea Group Co Ltd
GD Midea Air Conditioning Equipment Co Ltd
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Midea Group Co Ltd
Guangdong Midea Refrigeration Equipment Co Ltd
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Priority to CN201610703668.1A priority Critical patent/CN106253707A/en
Publication of CN106253707A publication Critical patent/CN106253707A/en
Pending legal-status Critical Current

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
    • H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
    • H02M7/06—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes without control electrode or semiconductor devices without control electrode
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/14—Arrangements for reducing ripples from dc input or output
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/42—Circuits or arrangements for compensating for or adjusting power factor in converters or inverters
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
    • Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Rectifiers (AREA)

Abstract

The present invention relates to air-conditioner power supply and control technical field, disclose a kind of power control circuit and air-conditioner, including rectification multiple pressuring circuit, in order to being unidirectional current by convert alternating current, and make DC voltage double；Balancing circuitry, in order to balance the parameter of rectification multiple pressuring circuit；Filter circuit, in order to filter the ripple current in described control circuit；Described filter circuit includes at least one filter capacitor E3 and at least one power consumption element of series connection；This control circuit improves the temperature rise of filter circuit, improves the filtering ratio of filter circuit, low cost, takies less installing space.

Description

Power control circuit and air-conditioner
Technical field
The present invention relates to air-conditioner power supply and control technical field, in particular it relates to a kind of power control circuit and air-conditioner.
Background technology
For meeting the demand that power supply is 110V air-conditioning market, transducer air conditioning controls power supply it is necessary that electric with 110V Source, has time for compatible adaptogen simultaneously and adjusts the demand of variable-frequency solutions, and electrical control circuit is at the necessary lifting voltage of power pack, to provide SPM (IPM) rated operational voltage, drives compressor operating by direct torque.With off-premises station power control circuit As a example by, its power supply, after over commutation, needs to increase capacitance voltage multiplier circuit, and this part uses two large bulk capacitance series connection, point The not energy reserve when alternating current positive-negative half-cycle, and be the IPM module for power supply of rear stage simultaneously.Electric capacity is operationally situated between because of self There is equivalent series resistance (ESR) in the problems such as matter is lost, production technology, and during two capacitance series work, positive-negative half-cycle is taken turns Discharge and recharge can cause serious ripple to be pulsed.Due to the existence of ESR, electric capacity can produce immeasurable temperature rise, electricity can be caused Hold and lost efficacy and burnt out circuit board and other devices.According to automatically controlled reliability and heat management analysis, temperature often raises 10 DEG C, and electric capacity makes Halving with the life-span, remaining electronic reliability also can be in time by sinusoidal exponential damping.
According to formula Ploss=I2 ripple* ESR, electric capacity reliability to be improved, reduces the temperature rise that loss brings, need to reduce stricture of vagina Ripple electric current and electric capacity ESR, ESR belongs to electrochemical capacitor self attributes, and ripple current IrippleCan be by modes such as circuit topologies Improve.Fig. 1 is the power control circuit connection figure of prior art 1, and this power control circuit includes rectification circuit as shown in Figure 1 12, voltage-multiplying circuit 13, filter circuit 14 and inverter circuit 15.During positive half cycle (the positive N of L bears), diode 23 in rectification circuit 12 Turning on diode 24, diode 21 and diode 22 end, and electric capacity E12 is filled by electric current through diode 23 and diode 24 Electricity, is charged to the peak value √ 2U close to alternating current u=Usin (ω t+ φ) at voltage ramp up by the voltage on electric capacity E12, Lower slope section is to load discharge.During negative half period (L is just bearing N), diode 21 and diode 22 turn on, diode 23 and diode 24 sections Only.Electric capacity E11 continues load discharge, and electric capacity E11 is charged by supply voltage, now, and the output end voltage U of voltage-multiplying circuit 1313 =UE11+UE12, the most repeatedly charge.Owing to ac period is much smaller relative to the charging and discharging time, through front several cycles After, voltage is stable to electrochemical capacitor discharge and recharge abundance, U13The most stable at 2 √ 2U.Produce in charge and discharge process is low Frequency pulsation is absorbed by the electric capacity E13 of rear class filter circuit 14.
Electric capacity E13 is used for filtering low-frequency ripple.The stricture of vagina caused due to two storage capacitor E12 and E11 in voltage-multiplying circuit 13 Pulsation wave is relatively big, and parallel connection is added on E13, and E13 needs to bear relatively large ripple current.Necessarily cause heating serious, reduce electric capacity E13 Service life cause lost efficacy.From the point of view of the repair and maintenance data feedback of market, this type of inefficacy case ratio is higher.
Fig. 2 is the power control circuit connection figure of prior art 2, and the power supply in prior art 2 as shown in Figure 2 controls electricity Road, can improve E23 electric capacity resistance to ripple current ability, and reduces the equivalent series resistance ESR of electric capacity E23, such as Fig. 2, in filtering In parallel first-level filtering wave circuit 23, i.e. shunt capacitance E24 again after the electric capacity E23 of circuit 22, share what part ripple current produced Power consumption, electric capacity E24 is pressure need are pressure more than electric capacity E21's and E22 of twice voltage-multiplying circuit 21, therefore can increase the biggest cost And installing space, and the capacity of electric capacity E23 and E24, resistance to ripple ability can not reduce.
Fig. 3 is the power control circuit connection figure of prior art 3.The power supply of prior art 3 as shown in Figure 3 controls electricity Road, uses one group of filter being made up of electric capacity E33 and electric capacity E34 the most in parallel after the voltage-multiplying circuit 32 of electric capacity E31 and E32 composition Wave circuit 31, the pressure of the electric capacity E33 and electric capacity E34 of this control circuit can be with the electric capacity E31 in voltage-multiplying circuit 32 and electric capacity E32 Identical, resistance to ripple ability can be improved.But the 3 of prior art kinds of methods filtering ripple current, all to install high power capacity Gao Naiwen The method of wave energy power electric capacity realizes, and increases relatively costly and needs bigger installing space.
Summary of the invention
It is an object of the invention to provide a kind of power control circuit and air-conditioner, this control circuit improves the temperature of filter circuit Rise, improve the filtering ratio of filter circuit, low cost, take less installing space.
To achieve these goals, the present invention provides a kind of power control circuit, including: rectification multiple pressuring circuit, in order to incite somebody to action Convert alternating current is unidirectional current, and makes DC voltage double；Balancing circuitry, in order to balance the parameter of rectification multiple pressuring circuit；Filter Wave circuit, in order to filter the ripple current in described control circuit；Described filter circuit includes at least one filtered electrical of series connection Hold E3 and at least one power consumption element.
Preferably, described rectification multiple pressuring circuit includes: rectification circuit, in order to alternating current is converted to unidirectional current, comprising: The negative pole of diode D1 and diode D3, described diode D1 connects the positive pole of described diode D3, described diode D1 and institute State and between diode D3, access the phase in three-phase electricity；Voltage-multiplying circuit, in order to make the DC voltage after rectification double；Described times Volt circuit includes electric capacity E1 and electric capacity E2, and these two electric capacity are in series and are connected in parallel on two outfans of described rectification circuit, institute afterwards State connection zero-power line between electric capacity E1 and described electric capacity E2.
Preferably, described rectification circuit also includes: diode D2 and diode D4, and the negative pole of described diode D2 connects institute State the positive pole of diode D4, connect between described diode D2 and described diode D4 and between described diode D1 and diode D3 Connect.
Preferably, one or more in described electric capacity E1, electric capacity E2 and described filter capacitor is electrochemical capacitor.
Preferably, after described balancing circuitry includes resistance R1 and resistance R2, described resistance R1 and described resistance R2 series connection also It is associated in two outfans of described rectification multiple pressuring circuit, with described electric capacity E1 and described electricity between described resistance R1 and described resistance R2 Hold and connect between E2.
Preferably, described power consumption element is resistance R3.
Preferably, described resistance R3 resistance be filter circuit all-in resistance R0 and filter capacitor E3 equivalent resistance ESR2 it Difference；All-in resistance R0 of described filter circuit is according to the filter circuit ripple voltage U when maximum power dissipationripple2Electricity is controlled with described Road is the ripple current I of filter capacitor E3 when maximum power dissipationripple2Determine.
Preferably, described power control circuit also includes: three-phase inverting circuit, is connected in parallel on the two ends of described filter circuit, The three-phase output end of described three-phase inverting circuit accesses motor three-phase windings.
Preferably, described power control circuit also includes: circuit of power factor correction, in order to alternating voltage and electric current Phase place is adjusted, including coil L in parallel and electric capacity C.
The present invention also provides for a kind of air-conditioner, and the off-premises station power control circuit of described air-conditioner includes: as above Power control circuit.
By technique scheme, by circuit of power factor correction, first AC supply voltage and current phase are entered Row sum-equal matrix；Alternating current power supply after adjustment enters rectification multiple pressuring circuit, and it includes rectification circuit and voltage-multiplying circuit, can be by alternating voltage It is converted into DC voltage, and makes magnitude of voltage double；By balancing circuitry, the capacitance parameter that can balance voltage-multiplying circuit is asymmetric；Warp The direct current series equivalent resistance because of times voltage capacitance of voltage-multiplying circuit output and the charging repeatedly of two positive negative cycles, make output electric current In there is ripple current, more filtered circuit filtering after, the pulsation of power supply can be smoothed and can filter because the electric capacity of voltage-multiplying circuit produces Raw ripple current, it is provided that stable power supply is output as late-class circuit and is three-phase inverting circuit and powers；Inverter circuit can be to Motor output voltage carries out PWM control.
Described filter circuit includes filter capacitor and resistance, and both connect formation filter circuit, are connected in parallel on voltage-multiplying circuit two End；Resistance one end is connected with filter capacitor, and the other end is connected on the negative terminal of voltage-multiplying circuit, and it can balance and compensate voltage-multiplying circuit and filter Not the mating of capacitor equivalent series resistance in wave circuit, this power control circuit can reduce filter capacitor under different working conditions Ripple current, and make filter capacitor and voltage-multiplying circuit two electric capacity temperature rise reduce, under the conditions of room temperature uses, filter capacitor can be improved Service life.Reduce cost of installation and maintenance.
The power control circuit of the present invention can reduce the voltage pulsation of input compressor of air conditioner/off-premises station, reduces filtering Electric capacity temperature rise, improves the situation of its heating, extends the service life of power control circuit, improves power control circuit and air-conditioner The reliability of compressor/off-premises station work.
Other features and advantages of the present invention will be described in detail in detailed description of the invention part subsequently.
Accompanying drawing explanation
Accompanying drawing is used to provide a further understanding of the present invention, and constitutes the part of description, with following tool Body embodiment is used for explaining the present invention together, but is not intended that limitation of the present invention.In the accompanying drawings:
Fig. 1 is the power control circuit connection figure of prior art 1；
Fig. 2 is the power control circuit connection figure of prior art 2；
Fig. 3 is the power control circuit connection figure of prior art 3；
Fig. 4 is the power control circuit connection figure of one embodiment of the present invention.
Detailed description of the invention
Below in conjunction with accompanying drawing, the detailed description of the invention of the present invention is described in detail.It should be appreciated that this place is retouched The detailed description of the invention stated is merely to illustrate and explains the present invention, is not limited to the present invention.
Fig. 4 is the connection figure of the power control circuit of one embodiment of the present invention.As shown in Figure 4, one of the present invention is real Execute the power control circuit of mode, including rectification multiple pressuring circuit 42, in order to being unidirectional current by convert alternating current, and make unidirectional current Voltage is double；Balancing circuitry 43, in order to balance the parameter of rectification multiple pressuring circuit 42；Filter circuit 44, in order to filter described control Ripple current in circuit；Described filter circuit 44 includes at least one filter capacitor E3 and at least one power consumption unit of series connection Part.
First alternating current power supply enters rectification multiple pressuring circuit 42, and it includes rectification circuit 421 and voltage-multiplying circuit 422, can will hand over Stream voltage is converted into DC voltage, and makes magnitude of voltage double；It is connected in parallel on the balancing circuitry 43 at voltage-multiplying circuit 422 two ends, can balance The capacitance parameter of voltage-multiplying circuit 422 is asymmetric；Through the filtered circuit of unidirectional current 44 of voltage-multiplying circuit 422 output, it can smooth electricity Source pulsation also can filter the ripple current that voltage-multiplying circuit 422 produces, and provides stable power supply output for late-class circuit.Filter circuit 44 at least one filter capacitor E3 including series connection and at least one power consumption element, filter capacitor E3 absorbs ripple current, and Power consumption element is used to consume this ripple current of part, the equivalent series resistance of balancing filter electric capacity E3 in filter circuit 44 loop ESR2, reduce the ripple current I of filter circuitripple2, thus reduce the temperature rise of filter capacitor E3.
According to one embodiment of the present invention, described rectification multiple pressuring circuit 42 includes: rectification circuit 421, in order to exchanging Electricity is converted to unidirectional current, comprising: the negative pole of diode D1 and diode D3, described diode D1 connects described diode D3's Positive pole, incoming transport power supply between described diode D1 and described diode D3；Voltage-multiplying circuit 422 is straight in order to make after rectification Stream piezoelectric voltage is double；Described voltage-multiplying circuit 422 includes electric capacity E1 and electric capacity E2, these two electric capacity be in series be connected in parallel on afterwards described Two outfans of rectification circuit 421, connect zero-power line between described electric capacity E1 and described electric capacity E2.
According to one embodiment of the present invention, described rectification circuit 421 also includes: diode D2 and diode D4, described The negative pole of diode D2 connects the positive pole of described diode D4, between described diode D2 and described diode D4 and described two poles Connect between pipe D1 and diode D3.
During positive half cycle (the positive N of L bears), diode D3 and diode D4 conducting, diode D1 and diode in rectification circuit 421 D2 ends, and electric capacity E2 is charged by electric current through diode D3 and diode D4, at voltage ramp up by the voltage on electric capacity E2 Being charged to the peak value √ 2U close to alternating current u=Usin (ω t+ φ), slope section is to load discharge under voltage.Negative half period (L is just bearing N) Time, diode D1 and diode D2 conducting, diode D3 and diode D4 cut-off.Electric capacity E2 continues load discharge, power supply electricity Press and electric capacity E1 is charged, now, the output end voltage U of voltage-multiplying circuit 422422=UE2+UE1, the most repeatedly charge.Due to exchange The electricity cycle is much smaller relative to the charging and discharging time, and after front several cycles, voltage is stable to capacitor charge and discharge abundance, U422 The most stable at 2 √ 2U.The low frequency pulsating produced in charge and discharge process is by the electric capacity E3 of rear class filter circuit 44 and merit Consumption element absorbs.
According to the one in one embodiment of the present invention, described electric capacity E1, electric capacity E2 and described filter capacitor E3 or Many persons are electrochemical capacitor.
According to one embodiment of the present invention, described balancing circuitry 43 include resistance R1 and resistance R2, described resistance R1 and Two outfans of described rectification multiple pressuring circuit 42 it are connected in parallel on, between described resistance R1 and described resistance R2 after described resistance R2 series connection It is connected with between described electric capacity E1 and described electric capacity E2.
Balancing circuitry 43 can balance the parameter of voltage-multiplying circuit 422 electrochemical capacitor E1 and electrochemical capacitor E2 equivalent series resistance not Symmetrical.
According to one embodiment of the present invention, described power consumption element is resistance R3.Can be such as milliohm level power consumption resistance, Equivalent series ESR with filter capacitor E32Resistors match.
According to one embodiment of the present invention, described resistance R3 resistance is all-in resistance R0 and the filter capacitor of filter circuit 44 The equivalent resistance ESR of E32Difference；
All-in resistance R0 of described filter circuit is according to the filter circuit 44 ripple voltage when control circuit maximum power dissipation Uripple2With described control circuit ripple current I of filter capacitor E3 when maximum power dissipationripple2Determine.
Power resistor R3 value method particularly includes:
Assume E1, E2 electric capacity ripple current when maximum power dissipationIripple1For 7A, equivalent series resistance sum ESR is 60 millis Europe, then electric capacity E1 and E2 two ends ripple voltage Uripple1=2Iripple1* ESR=0.84V.Ripple electricity when surveying the maximum power dissipation of E3 Stream Iripple2For 2A, according to one-port principle, the all-in resistance on the rear branch road is Uripple2/Iripple2=0.42 Ω, root Being 70m Ω according to E3 ESR when 120HZ/85 DEG C, calculate R3=0.42-0.07=0.35 Ω, power consumption is PR3=Iripple22R3 =1.4W, therefore selects 2W/350m Ω.Surveying under different operating modes, temperature rise can reduce by 5.2 to 15.7 degree, the power supply of the present invention In control circuit, the life-span upgrading of the filter capacitor E3 of filter circuit one times, also improves whole power control circuit simultaneously Reliability.
As above temperature rise and ripple current are improved data by shown in test and following two forms by series resistance R3 Test data draws, table 1 illustrates the filter capacitor E3 temperature rise before series resistance R3 and voltage-multiplying circuit 422 and the stricture of vagina of filter circuit 44 Ripple electric current, table 2 illustrates the ripple electricity of the filter capacitor E3 temperature rise after series resistance R3 and voltage-multiplying circuit 422 and filter circuit 44 Stream.
Test data such as table 1, table 2, the ripple electricity of electrochemical capacitor E1, E3 is tested in this experiment respectively under different working conditions Stream mean-square value and temperature rise situation.At freely frequency with lock high frequency, room temperature 35/32,43 DEG C, 47 DEG C, under 50 DEG C and 54 DEG C of operating modes, Test electrochemical capacitor E1 and E3 ripple current size and temperature rise situation, and record data.Table 1, table 2 is that convertible frequency air-conditioner is locking Data Comparison under altofrequency, before and after series connection milliohm level power consumption resistance R3.
Can draw from table, add ripple current value and the temperature of electrochemical capacitor E1 and E3 before and after milliohm level power consumption resistance R3 Rise and all have the ripple current of improvement, especially electrochemical capacitor E3 and temperature rise change more significantly.In operating mode outdoor/indoor temperature it is Under the conditions of 35/24 DEG C, temperature rise differs 15.7 DEG C, under 54/35 DEG C of operating mode, and E3 electric capacity temperature rise contrast also difference 5.2 DEG C, therefore may be used After electrochemical capacitor, concatenate impedance balance resistance to reach a conclusion to be conducive to improving electrolytic capacitor filter ripple and temperature rise.
Electrochemical capacitor temperature rise and ripple current data before table 1 series resistor
Electrochemical capacitor temperature rise and ripple current data after table 2 series resistor
Table 3 and table 4 are the voltage-multiplying circuit 422 before and after the series connection milliohm level power consumption resistance R3 under freely frequency operation and filtered electrical Hold E3 temperature rise and ripple current contrast.
Before table 3 series resistor, freely frequency runs electrochemical capacitor temperature rise and ripple current data
After table 4 series resistor, freely frequency runs electrochemical capacitor temperature rise and ripple current data
Under normal temperature condition, according to such as table 5 below, electrochemical capacitor heat analyzes and temperature rise-ripple current correction factor, 85 DEG C/ 5.48A/3000h from the point of view of the life-span, ripple current in the range of；
Table 5 ripple current temperature correction coefficient
Test data are taken from by electrochemical capacitor E3 surface temperature 60 degree during frequency, ripple current 7.79A, then the life-span is about 16968h, opens half a year according to air-conditioning in user 1 year, and electric capacity is all operated under 60 degree of high-temperature conditions, according to warp continuous half a year Testing formula to calculate, the electrochemical capacitor E3 life-span is 3.87.And reality is when 60 degree, ripple current only has 5.18A.Therefore fall volume sets Meter is fully.Therefore, compared to the prior art, the power control circuit of the present invention, milliohm level power consumption of connecting in filter circuit 44 electricity Resistance R3, in the case of saving installing space and cost, has obvious advantage.
According to one embodiment of the present invention, this power control circuit also includes: three-phase inverting circuit 45, is connected in parallel on described The two ends of filter circuit 44, the three-phase output end of described three-phase inverting circuit 45 accesses motor 46 three-phase windings.
According to one embodiment of the present invention, this power control circuit also includes: circuit of power factor correction 41, in order to right The phase place of alternating voltage and electric current is adjusted, including coil L1 in parallel and electric capacity C1.
The present invention also provides for a kind of air-conditioner, and the off-premises station power control circuit of described air-conditioner includes electricity as above Source control circuit.Stablize this air-conditioner outdoor unit input power, improve the heating of power control circuit, increase the service life, fall Low manufacture and maintenance cost.
The preferred embodiment of the present invention is described in detail above in association with accompanying drawing, but, the present invention is not limited to above-mentioned reality Execute the detail in mode, in the technology concept of the present invention, technical scheme can be carried out multiple letter Monotropic type, these simple variant belong to protection scope of the present invention.
It is further to note that each the concrete technical characteristic described in above-mentioned detailed description of the invention, at not lance In the case of shield, can be combined by any suitable means.In order to avoid unnecessary repetition, the present invention to various can The compound mode of energy illustrates the most separately.
Additionally, combination in any can also be carried out between the various different embodiment of the present invention, as long as it is without prejudice to this The thought of invention, it should be considered as content disclosed in this invention equally.

Claims (11)

1. a power control circuit, it is characterised in that including:
Rectification multiple pressuring circuit, in order to being unidirectional current by convert alternating current, and makes DC voltage double；
Balancing circuitry, in order to balance the parameter of rectification multiple pressuring circuit；
Filter circuit, in order to filter the ripple current in described control circuit；Described filter circuit includes at least one of series connection Filter capacitor E3 and at least one power consumption element.
Circuit the most according to claim 1, it is characterised in that described rectification multiple pressuring circuit includes:
Rectification circuit, in order to alternating current is converted to unidirectional current, comprising: diode D1 and diode D3, described diode D1 Negative pole connect the positive pole of described diode D3, access in three-phase electricity between described diode D1 and described diode D3 Phase；
Voltage-multiplying circuit, in order to make the DC voltage after rectification double；Described voltage-multiplying circuit includes electric capacity E1 and electric capacity E2, and these are two years old Individual electric capacity is in series and is connected in parallel on two outfans of described rectification circuit afterwards, connects electricity between described electric capacity E1 and described electric capacity E2 Source zero line.
Circuit the most according to claim 1, it is characterised in that described rectification circuit also includes: diode D2 and diode The negative pole of D4, described diode D2 connects the positive pole of described diode D4, between described diode D2 and described diode D4 and Connect between described diode D1 and diode D3.
4. require the circuit described in 2 according to power, it is characterised in that in described electric capacity E1, electric capacity E2 and described filter capacitor One or more is electrochemical capacitor.
5. according to the circuit described in claim any one of claim 2-4, it is characterised in that described balancing circuitry includes electricity Two outfans of described rectification multiple pressuring circuit, institute it is connected in parallel on after resistance R1 and resistance R2, described resistance R1 and described resistance R2 series connection State and be connected with between described electric capacity E1 and described electric capacity E2 between resistance R1 and described resistance R2.
Circuit the most according to claim 1, it is characterised in that after described filter capacitor E3 and the series connection of described power consumption element It is connected in parallel on described balancing circuitry two ends.
Circuit the most according to claim 1, it is characterised in that described power consumption element is resistance R3.
Circuit the most according to claim 7, it is characterised in that described resistance R3 resistance be filter circuit all-in resistance R0 with The equivalent resistance ESR of filter capacitor E32Difference；
All-in resistance R0 of described filter circuit is according to the filter circuit ripple voltage U when maximum power dissipationripple2Electricity is controlled with described Road is the ripple current I of filter capacitor E3 when maximum power dissipationripple2Determine.
Circuit the most according to claim 1, it is characterised in that also include:
Three-phase inverting circuit, is connected in parallel on the two ends of described filter circuit, and the three-phase output end of described three-phase inverting circuit accesses electricity Machine three-phase windings.
Circuit the most according to claim 1, it is characterised in that also include:
Circuit of power factor correction, in order to be adjusted the phase place of alternating voltage and electric current, including coil L1 in parallel and electricity Hold C1.
11. 1 kinds of air-conditioners, it is characterised in that the off-premises station power control circuit of described air-conditioner includes: claim 1-10 Any one of power control circuit described in claim.
CN201610703668.1A 2016-08-22 2016-08-22 Power control circuit and air-conditioner Pending CN106253707A (en)

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Cited By (2)

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CN111130368A (en) * 2020-01-20 2020-05-08 爱士惟新能源技术(江苏)有限公司 Control method and system of photovoltaic inverter
CN113685996A (en) * 2020-05-18 2021-11-23 青岛海尔空调器有限总公司 Control method of air conditioner compressor and air conditioner

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CN111130368A (en) * 2020-01-20 2020-05-08 爱士惟新能源技术(江苏)有限公司 Control method and system of photovoltaic inverter
CN111130368B (en) * 2020-01-20 2021-03-19 爱士惟新能源技术(江苏)有限公司 Control method and system of photovoltaic inverter
CN113685996A (en) * 2020-05-18 2021-11-23 青岛海尔空调器有限总公司 Control method of air conditioner compressor and air conditioner

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Application publication date: 20161221